of san jose



aosnwws.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED NOV. 21. 1916.

1 ,323,545 Patented Dec. 2, 1919.

FIGURE,- 2

serene ANT rron.

PONTUS OS 'IENBERG, OF SAN JOSE, CALIFORNIA, NAISIVIITH, OF SAN JOSE,

ASSIGNOR 0F ONE-HALF TO JOHN A. CALIFORNIA.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Dec. 2, 1919..

Application filed November 27, 1916. Serial No. 133,725.

and State of California, have invented certam new and useful Improvements in' Internal-Combustion Engines, of which the following is a specification.

y invention relates to internal combustion engines, and particularly to the location of the exhaust passage or passages in the cylinder thereof.

r rat a) One Object of my invention is to provide an mternal'combustion engine that will be economlcalin the use of fuel. Another object is to provide an internal combustion engine that will more the burnt gases than the engines now in use. Another object of my invention is to provide for the explosion of a compara tively small amount of gas mixture With a short compression stroke and thus secure a comparatively long power stroke of the pisto effectually exhaust With the above and other objects in view, the invention consists in the novel and useful provision, formation, construction, combination and relative arrangement of parts, members and features as hereinafter described, shown in the drawing and finally pointed out in the claims.

In the drawings:

Figure 1 is a longitudinal section through an internal combustion engine embodying my invention and in which a sleeve valve is used. I

Fig. 2 is a longitudinal section through an internal combustion engine embodying my invention-and in which a puppet valve is used.

Fig. 3 is a diagrammatical illustration showing one method of operating the rotary valve lndicated in Fig. 1.

Fig. 4 is a diagrammatical illustration showing the operating cycle of an engine embodying my invention.

Similar characters of reference indicate similar parts throughout the several views.

Referrlng now moreparticularly to the drawings, 1 indicates the engine cylinder, 2 the crank case, 3 the water jacket, l the piston head, 5 a sleeve valve operated in any suitable manner as by arm 6 and eccentric 7 on shaft 8, and 9 the piston rod. Cylinder 1 is tapped 10 for the insertion of a .mdicates the middle half of distance 'carbureter valve In cylinder 1 and within the distance indicated by the letter B are positioned exrhaust ports 16 and exhaust port 17, said exhaust port 17 being independently controlled by rotary valve 18,.said valve 18 being operated as indicated in the diagram in Fig. 4'by arm 18 link 18", arm 18 and 18 1 Sleeve valve 5 is provided with ports '13, 16 and 17 which register with their respective ports 13, 16'and 17 at the completion of the power stroke of piston head 4, sleeve closing said ports 13, 16 and 17 as piston head 4 advances, arm 6, eccentric 7 and piston rod 9 operating in the usual manner.

'As the completed and the various ports are caused to register as above described, port 17 being closed by valve 18, a fresh supply of combustible mixture rushes into combustion chamber 12 through ports 13 and a portion of the burnt gases exhaust through ports 16. As the incoming fresh mixture now fills chamber 12 the compression stroke of the piston head 4 drives out the remainder of the burnt gases through ports on to compression, ports 16 and 13 being closed by sleeve valve 5 as hereinbefore described.

The operating cycle of my improved engine is clearly illustrated in Fig. 5. In this figure C represents the power stroke of piston head 4, D that portion of the return stroke during which a fresh charge is admitted to chamber 12 and the burnt gases exhausted, and E that portion of the return stroke during which compression takes place. As in the sectional illustrations represents the full distance traversed by the piston head 4, and B represents the middle half of distance A and within which distance point F portioning D to E as circumstances may require. With port 16 positioned as shown in Fig. 1, point F would be shown in the diagram at F. With port 17 open point F would be shown in the diagram at F.

valve 5 advancing and power stroke of piston head this is positioned thereby pro- 1 16 and passes llfatl When the speed of the engineisreduced and a smaller charge of .fuel is being fed into chamber 12, and the carbureter valve s partially closed, the several parts are positioned as indicated in dottedlines at 18,18, 18 18 andlS inFig. 4;, the rotaryvalve 18 burnt gases.

If the en 18 is opene' ine is running slower and valve by the action of the carbureter valve, or by any other similar connection, as illustrated in Fig. 4, then the reduced supof fresh fuel is compressed in a short compression stroke but is expanded in a long power stroke because port l7 does not register with port 17 until the power stroke is I nearly completed, but when it does open the the spirit of my said port 17 exhausts simultaneously with ports 16. c

In Fig. 2 is shown how an ordinary puppet valve may be used instead of the sleeve valve described above. Exhaust port 16 is provided with a seat 19 to receive valve 20. Valve 20 is operated by rod, 21 slidably mounted in bearings 22 and in turn operated b cam 23 on crank shaft 8, so that when the piston head advances cam 23 closes valve 20 on seat 16 While said piston passes .on to compression but opens upon the completion of the power stroke of said piston.

' S1nce my'invention consists essentially in the location of the exhaust port or ports, it is evident that any suitable-form or type of valve or valves may be used without departing from the spiritof my invention, and the same may be embodied in many different types of engines without departing from stood, therefore, that I do not wish to conabove set forth because the invention. It is under-,

fine myself to the relative arrangement of parts and features herein shown and described, but that various changes may be made within the scope of the appended claims.

Having thus described my invention; what I claim as new and desire to secure by Letters Patent, is:

1. An internal combustion engine including a cylinder having a plurality of exhaust ports disposed therein at varying distances from the-cylinder head, means cooperating with the piston for opening or closing said exhaust ports and additional means operated independently of the piston for controlling the exspecific construction and at predetermined intervals,

haust port positioned nearest the head of the" cylinder.

. 2. An internal combustion e ine including a cylinder having a plurali y of exhaust ports disposed within the center half. of that portion thereof traversed by .theexplosion end of the piston head and at varying distances from the cylinder head, means cooperating with thepiston for opening or closing said exhaust ports at predetermined intervals, and additional means operated independently of the piston for controlling the exhaust port positioned nearest the head of the cylinder.

3. An internal combustion engine including a cylinder having a pluralityof exhaust ports disposed within the center half. of that portion of said cylinder traversed by the eX- plosion end of the piston head and at varying distances from the cylinder head, and a sleeve valve operatively positioned in said cylinder and provided with ports adapted to be simultaneously thrown into or out of register with their respective exhaust ports when said engine-is in operation, and independent means for controlling the exhaust port positioned nearest the head of said cylinder In testimony whereof I have hereunto aflixed my signature this 21st day of November, 1916.

PONTUS osTENBElRe. 

